Illuminations: Exploring Flips and Slides
Illuminations (National Council of Teachers of Mathematics)

This lesson builds on the previous two lessons and encourages students to explore the geometric transformations of reflections and translations.

Illuminations: Reflect On This
Illuminations (National Council of Teachers of Mathematics)

This lesson, adapted from an activity in Navigating through Geometry in Grades 9‑12, requires students to investigate reflections using hinged mirrors.